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Martínez JRW, Planet PJ, Spencer-Sandino M, Rivas L, Díaz L, Moustafa AM, Quesille-Villalobos A, Riquelme-Neira R, Alcalde-Rico M, Hanson B, Carvajal LP, Rincón S, Reyes J, Lam M, Calderon JF, Araos R, García P, Arias CA, Munita JM. Dynamics of the MRSA Population in a Chilean Hospital: a Phylogenomic Analysis (2000-2016). Microbiol Spectr 2023; 11:e0535122. [PMID: 37338398 PMCID: PMC10433796 DOI: 10.1128/spectrum.05351-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 05/29/2023] [Indexed: 06/21/2023] Open
Abstract
The global dissemination of methicillin-resistant Staphylococcus aureus (MRSA) is associated with the emergence and establishment of clones in specific geographic areas. The Chilean-Cordobes clone (ChC) (ST5-SCCmecI) has been the predominant MRSA clone in Chile since its first description in 1998, despite the report of other emerging MRSA clones in recent years. Here, we characterize the evolutionary history of MRSA from 2000 to 2016 in a Chilean tertiary health care center using phylogenomic analyses. We sequenced 469 MRSA isolates collected between 2000 and 2016. We evaluated the temporal trends of the circulating clones and performed a phylogenomic reconstruction to characterize the clonal dynamics. We found a significant increase in the diversity and richness of sequence types (STs; Spearman r = 0.8748, P < 0.0001) with a Shannon diversity index increasing from 0.221 in the year 2000 to 1.33 in 2016, and an effective diversity (Hill number; q = 2) increasing from 1.12 to 2.71. The temporal trend analysis revealed that in the period 2000 to 2003 most of the isolates (94.2%; n = 98) belonged to the ChC clone. However, since then, the frequency of the ChC clone has decreased over time, accounting for 52% of the collection in the 2013 to 2016 period. This decline was accompanied by the rise of two emerging MRSA lineages, ST105-SCCmecII and ST72-SCCmecVI. In conclusion, the ChC clone remains the most frequent MRSA lineage, but this lineage is gradually being replaced by several emerging clones, the most important of which is clone ST105-SCCmecII. To the best of our knowledge, this is the largest study of MRSA clonal dynamics performed in South America. IMPORTANCE Methicillin-resistant Staphylococcus aureus (MRSA) is a major public health pathogen that disseminates through the emergence of successful dominant clones in specific geographic regions. Knowledge of the dissemination and molecular epidemiology of MRSA in Latin America is scarce and is largely based on small studies or more limited typing techniques that lack the resolution to represent an accurate description of the genomic landscape. We used whole-genome sequencing to study 469 MRSA isolates collected between 2000 and 2016 in Chile providing the largest and most detailed study of clonal dynamics of MRSA in South America to date. We found a significant increase in the diversity of MRSA clones circulating over the 17-year study period. Additionally, we describe the emergence of two novel clones (ST105-SCCmecII and ST72-SCCmecVI), which have been gradually increasing in frequency over time. Our results drastically improve our understanding of the dissemination and update our knowledge about MRSA in Latin America.
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Affiliation(s)
- José R. W. Martínez
- Genomics & Resistant Microbes (GeRM), ICIM, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
- Multidisciplinary Initiative for Collaborative Research On Bacterial Resistance (MICROB-R), Santiago, Chile
| | - Paul J. Planet
- Division of Pediatric Infectious Diseases, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
- American Museum of Natural History, New York, New York, USA
| | - Maria Spencer-Sandino
- Genomics & Resistant Microbes (GeRM), ICIM, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
- Multidisciplinary Initiative for Collaborative Research On Bacterial Resistance (MICROB-R), Santiago, Chile
| | - Lina Rivas
- Genomics & Resistant Microbes (GeRM), ICIM, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
- Multidisciplinary Initiative for Collaborative Research On Bacterial Resistance (MICROB-R), Santiago, Chile
| | - Lorena Díaz
- Genomics & Resistant Microbes (GeRM), ICIM, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
- Multidisciplinary Initiative for Collaborative Research On Bacterial Resistance (MICROB-R), Santiago, Chile
- Molecular Genetics and Antimicrobial Resistance Unit, Universidad El Bosque, Bogotá, Colombia
| | - Ahmed M. Moustafa
- Division of Pediatric Infectious Diseases, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
- Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
- Division of Gastroenterology, Hepatology, and Nutrition, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Ana Quesille-Villalobos
- Genomics & Resistant Microbes (GeRM), ICIM, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
- Multidisciplinary Initiative for Collaborative Research On Bacterial Resistance (MICROB-R), Santiago, Chile
| | - Roberto Riquelme-Neira
- Genomics & Resistant Microbes (GeRM), ICIM, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
- Multidisciplinary Initiative for Collaborative Research On Bacterial Resistance (MICROB-R), Santiago, Chile
- Núcleo de Investigaciones Aplicadas en Ciencias Veterinarias y Agronómicas, Facultad de Medicina Veterinaria y Agronomía, Universidad de Las Américas, Santiago, Chile
| | - Manuel Alcalde-Rico
- Genomics & Resistant Microbes (GeRM), ICIM, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
- Multidisciplinary Initiative for Collaborative Research On Bacterial Resistance (MICROB-R), Santiago, Chile
- Grupo de Resistencia a los Antibióticos en Bacterias Patógenas y Ambientales (GRABPA), Pontificia Univ. Católica de Valparaíso, Valparaiso, Chile
| | - Blake Hanson
- Center for Antimicrobial Resistance and Microbial Genomics, Univ. of Texas Health Science Center, McGovern Medical School, Houston, Texas, USA
| | - Lina P. Carvajal
- Molecular Genetics and Antimicrobial Resistance Unit, Universidad El Bosque, Bogotá, Colombia
| | - Sandra Rincón
- Molecular Genetics and Antimicrobial Resistance Unit, Universidad El Bosque, Bogotá, Colombia
| | - Jinnethe Reyes
- Molecular Genetics and Antimicrobial Resistance Unit, Universidad El Bosque, Bogotá, Colombia
| | - Marusella Lam
- Departamento de Laboratorios Clínicos, Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Juan F. Calderon
- Centro de Genética y Genómica Instituto de Ciencias e Innovación en Medicina Facultad de Medicina Clínica Alemana Universidad Del Desarrollo, Santiago, Chile
- Research Center for the Development of Novel Therapeutic Alternatives for Alcohol Use Disorders, Santiago, Chile
| | - Rafael Araos
- Genomics & Resistant Microbes (GeRM), ICIM, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
- Multidisciplinary Initiative for Collaborative Research On Bacterial Resistance (MICROB-R), Santiago, Chile
| | - Patricia García
- Multidisciplinary Initiative for Collaborative Research On Bacterial Resistance (MICROB-R), Santiago, Chile
- Departamento de Laboratorios Clínicos, Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - César A. Arias
- Division of Infectious Diseases, Houston Methodist Hospital, Houston, Texas, USA
- Center for Infectious Diseases, Houston Methodist Research Institution, Houston, Texas, USA
- Department of Medicine, Weill Cornell Medical College, New York, New York, USA
| | - José M. Munita
- Genomics & Resistant Microbes (GeRM), ICIM, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
- Multidisciplinary Initiative for Collaborative Research On Bacterial Resistance (MICROB-R), Santiago, Chile
- Hospital Padre Hurtado, Santiago, Chile
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Señorans S, R-Díaz J, Escalante D, González LA, Díaz L. Ce/Pumice and Ni/Pumice as heterogeneous catalysts for syngas production from biomass gasification. Waste Manag 2023; 166:270-279. [PMID: 37207588 DOI: 10.1016/j.wasman.2023.05.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 04/27/2023] [Accepted: 05/09/2023] [Indexed: 05/21/2023]
Abstract
This work presents a study of synthesis and characterization of catalysts-based cerium and nickel supported on the pumice stone (Ce/Pumice and Ni/Pumice) to be used in the gasification process of an invasive species present in the Canary Islands, such as Pennisetum setaceum to obtain syngas. Specifically, the effect of the metal impregnated on the pumice, and the effect of catalyst on the gasification process was studied. For this purpose, the composition of the gas was determined and the results obtained were compared with those obtained in non-catalytic thermochemical processes. Gasification tests were performed using a simultaneous thermal analyzer coupled with a mass spectrometer, providing a detailed analysis of the gases released during the process. The results showed that during the catalytic gasification process of the Pennisetum setaceum, the gases produced appear at lower temperatures in the catalytic process that in the non-catalytic process. Specifically, H2 appears at 640.42 °C and 641.84 °C when Ce/pumice and Ni/pumice were used as catalyst, respectively, compared to 697.41 °C for the non-catalytic process. Moreover, the reactivity at 50 % of char conversion for the catalytic process (0.34 and 0.38 min-1 for Ce/pumice and Ni/pumice, respectively) was higher than for the non-catalytic process (0.28 min-1), indicating that the incorporation of Ce and Ni on the pumitic material increases the gasification rate of the char compared to the pumitic support. Catalytic biomass gasification is an innovative technology that can provide new opportunities for research and development of renewable energy technologies, as well as for the creation of green jobs.
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Affiliation(s)
- S Señorans
- Chemical Engineering Department, University of La Laguna, Avda. Astrofísico Fco. Sánchez s/n, La Laguna, Tenerife, Canary Island 38200, Spain
| | - J R-Díaz
- Chemical Engineering Department, University of La Laguna, Avda. Astrofísico Fco. Sánchez s/n, La Laguna, Tenerife, Canary Island 38200, Spain
| | - D Escalante
- Chemical Engineering Department, University of La Laguna, Avda. Astrofísico Fco. Sánchez s/n, La Laguna, Tenerife, Canary Island 38200, Spain
| | - L A González
- Chemical Engineering Department, University of La Laguna, Avda. Astrofísico Fco. Sánchez s/n, La Laguna, Tenerife, Canary Island 38200, Spain
| | - L Díaz
- Chemical Engineering Department, University of La Laguna, Avda. Astrofísico Fco. Sánchez s/n, La Laguna, Tenerife, Canary Island 38200, Spain.
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Díaz L, Horstmann F, Brito A, González L. A comprehensive review of the influence of co-solvents on the catalysed methanolysis process to obtain biodiesel. Heliyon 2023; 9:e13006. [PMID: 36747949 PMCID: PMC9898661 DOI: 10.1016/j.heliyon.2023.e13006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 01/12/2023] [Accepted: 01/13/2023] [Indexed: 01/19/2023] Open
Abstract
Non-polar oil and polar short-chain alcohols, used as reactants in the transesterification reaction, are immiscible. Transesterification reactions can only occur on the phase boundary and they are therefore diffusion-limited. Several methods are employed to overcome the limitation of mass transfer by increasing miscibility and thereby accelerating the reaction. Co-solvents are additional solvents that should be soluble in the oil and alcohol phase; this could lead to an increase in the reaction rate and a reduction in the temperature and the reaction time. This work aims to provide a comprehensive literature review on the influence of co-solvents on the processes of catalysed methanolysis for the biodiesel production. Most authors have not systematically determined and justified the effects of cosolvents. So far it seems impossible to establish which cosolvents are the most suitable for which methanolysis systems. The purpose of this work is to highlight and justify the differences or similarities in co-solvent impacts among the various publications by examining the chemical structure of the respective co-solvents, including the functional groups and the resulting physicochemical properties such as the dielectric constant or the log P value. Besides biodiesel, co-solvents like THF and acetone seems to be the best choices for alkaline methanolysis systems due to successful broadly applications with different oils, catalysts and reaction conditions. Moreover, THF and n-hexane are essentially advisable for in-situ methanolysis.
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Affiliation(s)
- L. Díaz
- Chemical Engineering Department, University of La Laguna; Avda. Astrofísico Fco. Sánchez s/n, La Laguna, Tenerife, Canary Island, 38200, Spain,Corresponding author.
| | - F. Horstmann
- Department of Food Technology, Hochschule Fulda University of Applied Sciences, Leipziger Straße 123, Fulda, 36037, Germany
| | - A. Brito
- Chemical Engineering Department, University of La Laguna; Avda. Astrofísico Fco. Sánchez s/n, La Laguna, Tenerife, Canary Island, 38200, Spain
| | - L.A. González
- Chemical Engineering Department, University of La Laguna; Avda. Astrofísico Fco. Sánchez s/n, La Laguna, Tenerife, Canary Island, 38200, Spain
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Mojica MF, De La Cadena E, Ríos R, García-Betancur JC, Díaz L, Reyes J, Hernández-Gómez C, Radice M, Gales AC, Castañeda Méndez P, Munita JM, Pallares CJ, Martínez JRW, Villegas MV. Molecular mechanisms leading to ceftolozane/tazobactam resistance in clinical isolates of Pseudomonas aeruginosa from five Latin American countries. Front Microbiol 2022; 13:1035609. [PMID: 36353456 PMCID: PMC9638110 DOI: 10.3389/fmicb.2022.1035609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Accepted: 09/30/2022] [Indexed: 12/03/2022] Open
Abstract
Objectives Identify molecular mechanisms responsible for the in vitro non-susceptibility to ceftolozane/tazobactam (TOL) in a group of 158 clinical isolates of Pseudomonas aeruginosa from five Latin American countries collected before the introduction of TOL into the clinical practice. Methods Clinical isolates of P. aeruginosa (n = 504) were collected between January 2016 and October 2017 from 20 hospitals located in Argentina, Brazil, Chile, Colombia, and Mexico. Minimum inhibitory concentrations (MICs) to TOL were determined by standard broth microdilution and interpreted according to CLSI breakpoints. Initially, production of carbapenemases in TOL non-susceptible isolates was assessed by Rapidec® followed by qPCR to detect blaKPC, blaNDM-1, blaVIM, and blaIMP. Illumina® WGS was performed for isolates in which non-susceptibility to TOL was not mediated by carbapenemases. Results A total of 158 (31.3%) isolates were non-susceptible to TOL. In 74 (46.8%) of these isolates, non-susceptibility to TOL was explained by the production of at least one carbapenemase. WGS revealed that some isolates carried ESBLs, mutated blaPDC and ampD, associated with decreased susceptibility to TOL. Conclusion Substitutions found in PDC and carbapenemase production were the most common presumed mechanisms of resistance to TOL detected in this study. This study shows that epidemiological surveillance is warranted to monitor the emergence of novel mechanisms of resistance to TOL that might compromise its clinical utility.
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Affiliation(s)
- María F. Mojica
- Grupo de Investigación en Resistencia Antimicrobiana y Epidemiologia Hospitalaria, Universidad El Bosque, Bogotá, Colombia
- Department of Molecular Biology and Microbiology, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
- Cleveland VA Medical Center for Antimicrobial Resistance and Epidemiology (Case VA CARES), Case Western Reserve University, Cleveland, OH, United States
- Research Service, VA Northeast Ohio Healthcare System, Cleveland, OH, United States
- *Correspondence: María F. Mojica,
| | - Elsa De La Cadena
- Grupo de Investigación en Resistencia Antimicrobiana y Epidemiologia Hospitalaria, Universidad El Bosque, Bogotá, Colombia
| | - Rafael Ríos
- Molecular Genetics and Antimicrobial Resistance Unit, Universidad El Bosque, Bogotá, Colombia
| | - Juan Carlos García-Betancur
- Grupo de Investigación en Resistencia Antimicrobiana y Epidemiologia Hospitalaria, Universidad El Bosque, Bogotá, Colombia
| | - Lorena Díaz
- Molecular Genetics and Antimicrobial Resistance Unit, Universidad El Bosque, Bogotá, Colombia
- Millenium Initiative for Collaborative Research on Bacterial Resistance (MICROB-R), Santiago, Chile
| | - Jinnethe Reyes
- Molecular Genetics and Antimicrobial Resistance Unit, Universidad El Bosque, Bogotá, Colombia
| | - Cristhian Hernández-Gómez
- Grupo de Investigación en Resistencia Antimicrobiana y Epidemiologia Hospitalaria, Universidad El Bosque, Bogotá, Colombia
| | - Marcela Radice
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Ana C. Gales
- Universidade Federal de São Paulo, Division of Infectious Diseases, Brazil
| | | | - José M. Munita
- Millenium Initiative for Collaborative Research on Bacterial Resistance (MICROB-R), Santiago, Chile
- Genomics and Resistant Microbes (GeRM) Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
| | - Christian José Pallares
- Grupo de Investigación en Resistencia Antimicrobiana y Epidemiologia Hospitalaria, Universidad El Bosque, Bogotá, Colombia
- Clínica Imbanaco, Grupo Quiron, Cali, Colombia
| | - José R. W. Martínez
- Millenium Initiative for Collaborative Research on Bacterial Resistance (MICROB-R), Santiago, Chile
- Genomics and Resistant Microbes (GeRM) Instituto de Ciencias e Innovación en Medicina, Facultad de Medicina, Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
| | - María Virginia Villegas
- Grupo de Investigación en Resistencia Antimicrobiana y Epidemiologia Hospitalaria, Universidad El Bosque, Bogotá, Colombia
- Clínica Imbanaco, Grupo Quiron, Cali, Colombia
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Schwab N, Díaz L, Galtés I. Intracerebral and subarachnoid hemorrhage after suicidal "near-hanging". Int J Legal Med 2022; 136:1359-1362. [PMID: 35622131 DOI: 10.1007/s00414-022-02832-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 04/25/2022] [Indexed: 10/18/2022]
Abstract
Hanging is one of the most common methods of attempting suicide with a fast occurring death and a high lethality rate. Depending on how fast the hanged individuals are found, they may be rescued, which is referred to as "near-hanging." Whilst hypoxic and ischemic brain damage are common findings in hanging, intracranial hemorrhages seem to be a rare occurrence. To the authors' knowledge, this is the first autopsy case report of an intracerebral and subarachnoid hemorrhage in a delayed death after incomplete hanging. We hypothesize that the combination of two mechanisms is involved in the development of such hemorrhages. First, the persistent venous hypertension during incomplete hanging causing endothelial damage resulting in vascular leakage. Second, the reperfusion of the brain due to recovery of venous blood return after the release form the rope. Whereas intracranial hemorrhage is not a common finding in daily autopsy cases of fatal hanging, it might be a severe complication in rescued cases.
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Affiliation(s)
- Nathalie Schwab
- Forensic Pathology Service, Catalonian Institute of Legal Medicine and Forensic Science (IMLCFC), Ciutat de la Justícia, Gran Via de les Corts Catalanes, 111 Edifici G, 08075, Barcelona, Spain
| | - Lorena Díaz
- Departamento de Barcelona, Instituto Nacional de Toxicología y Ciencias Forenses (INTyCF), Ministerio de Justicia, Barcelona, Spain
| | - Ignasi Galtés
- Forensic Pathology Service, Catalonian Institute of Legal Medicine and Forensic Science (IMLCFC), Ciutat de la Justícia, Gran Via de les Corts Catalanes, 111 Edifici G, 08075, Barcelona, Spain. .,Departament de Psiquiatria i Medicina Legal, Unitat de Medicina Legal i Forense, Universitat Autònoma de Barcelona (UAB), Barcelona, Spain.
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Díaz L, Rodríguez VD, González-Rodríguez M, Rodríguez-Castellón E, Algarra M, Núñez P, Moretti E. M/TiO 2 (M = Fe, Co, Ni, Cu, Zn) catalysts for photocatalytic hydrogen production under UV and visible light irradiation. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01311k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Cu/TiO2 photocatalysts can be considered a promising low-cost alternative to the well-known Pt/TiO2 system for hydrogen production under UV-Vis irradiation.
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Affiliation(s)
- L. Díaz
- Departamento de Química
- U.D. Química Inorgánica
- Universidad de La Laguna
- 38206 La Laguna
- Spain
| | - V. D. Rodríguez
- Departamento de Física
- Universidad de La Laguna
- 38206 La Laguna
- Spain
- Instituto Universitario de Materiales y Nanotecnología
| | - M. González-Rodríguez
- Departamento de Química
- U.D. Química Inorgánica
- Universidad de La Laguna
- 38206 La Laguna
- Spain
| | - E. Rodríguez-Castellón
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Málaga
- 29010 Málaga
- Spain
| | - M. Algarra
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Málaga
- 29010 Málaga
- Spain
| | - P. Núñez
- Departamento de Química
- U.D. Química Inorgánica
- Universidad de La Laguna
- 38206 La Laguna
- Spain
| | - E. Moretti
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari Venezia
- 30172 Mestre Venezia
- Italy
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Olmos-Ortiz A, Déciga-García M, Preciado-Martínez E, Bermejo-Martínez L, Flores-Espinosa P, Mancilla-Herrera I, Irles C, Helguera-Repetto AC, Quesada-Reyna B, Goffin V, Díaz L, Zaga-Clavellina V. Prolactin decreases LPS-induced inflammatory cytokines by inhibiting TLR-4/NFκB signaling in the human placenta. Mol Hum Reprod 2020; 25:660-667. [PMID: 31263869 PMCID: PMC6821386 DOI: 10.1093/molehr/gaz038] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 05/17/2019] [Indexed: 12/21/2022] Open
Abstract
Prolactin (PRL) plays an important role in trophoblast growth, placental angiogenesis and immunomodulation within the feto-maternal interface, where different cell types secrete PRL and express its receptor. During pregnancy, inflammatory signalling is a deleterious event that has been associated with poor fetal outcomes. The placenta is highly responsive to the inflammatory stimulus; however, the actions of PRL in placental immunity and inflammation remain largely unknown. The aim of this study was to evaluate PRL effects on the TLR4/NFkB signalling cascade and associated inflammatory targets in cultured explants from healthy term human placentas. An in utero inflammatory scenario was mimicked using lipopolysaccharides (LPS) from Escherichia coli. PRL significantly reduced LPS-dependent TNF-α, IL-1β and IL-6 secretion and intracellular levels. Mechanistically, PRL prevented LPS-mediated upregulation of TLR-4 expression and NFκB phosphorylation. In conclusion, PRL limited inflammatory responses to LPS in the human placenta, suggesting that this hormone could be critical in inhibiting exacerbated immune responses to infections that could threaten pregnancy outcome. This is the first evidence of a mechanism for anti-inflammatory activity of PRL in the human placenta, acting as a negative regulator of TLR-4/NFkB signaling.
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Affiliation(s)
- A Olmos-Ortiz
- Departamento de Inmunobioquímica, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Ciudad de México 11000, México
| | - M Déciga-García
- Departamento de Inmunobioquímica, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Ciudad de México 11000, México
| | - E Preciado-Martínez
- Departamento de Inmunobioquímica, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Ciudad de México 11000, México
| | - L Bermejo-Martínez
- Departamento de Inmunobioquímica, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Ciudad de México 11000, México
| | - P Flores-Espinosa
- Departamento de Inmunobioquímica, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Ciudad de México 11000, México
| | - I Mancilla-Herrera
- Departamento de Infectología e Inmunología, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Ciudad de México 11000, México
| | - C Irles
- Departamento de Fisiología y Desarrollo Celular, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Ciudad de México 11000, México
| | - A C Helguera-Repetto
- Departamento de Inmunobioquímica, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Ciudad de México 11000, México
| | - B Quesada-Reyna
- División de Obstetricia, UMAE Hospital de Gineco-Obstetricia No. 4 "Luis Castelazo Ayala", IMSS, Ciudad de México, México 01090
| | - V Goffin
- Inserm Unit 1151, Institut Necker-Enfants Malades (INEM), Université Paris Descartes, Paris, France 75993
| | - L Díaz
- Departamento de Biología de la Reproducción Dr. Carlos Gual Castro, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Ciudad de México, México 14080
| | - V Zaga-Clavellina
- Departamento de Inmunobioquímica, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Ciudad de México 11000, México
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Posada-Perlaza CE, Ramírez-Rojas A, Porras P, Adu-Oppong B, Botero-Coy AM, Hernández F, Anzola JM, Díaz L, Dantas G, Reyes A, Zambrano MM. Bogotá River anthropogenic contamination alters microbial communities and promotes spread of antibiotic resistance genes. Sci Rep 2019; 9:11764. [PMID: 31409850 PMCID: PMC6692338 DOI: 10.1038/s41598-019-48200-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Accepted: 07/22/2019] [Indexed: 01/13/2023] Open
Abstract
The increase in antibiotic resistant bacteria has raised global concern regarding the future effectiveness of antibiotics. Human activities that influence microbial communities and environmental resistomes can generate additional risks to human health. In this work, we characterized aquatic microbial communities and their resistomes in samples collected at three sites along the Bogotá River and from wastewaters at three city hospitals, and investigated community profiles and antibiotic resistance genes (ARGs) as a function of anthropogenic contamination. The presence of antibiotics and other commonly used drugs increased in locations highly impacted by human activities, while the diverse microbial communities varied among sites and sampling times, separating upstream river samples from more contaminated hospital and river samples. Clinically relevant antibiotic resistant pathogens and ARGs were more abundant in contaminated water samples. Tracking of resistant determinants to upstream river waters and city sources suggested that human activities foster the spread of ARGs, some of which were co-localized with mobile genetic elements in assembled metagenomic contigs. Human contamination of this water ecosystem changed both community structure and environmental resistomes that can pose a risk to human health.
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Affiliation(s)
- Carlos Eduardo Posada-Perlaza
- Computational Biology and Microbial Ecology Group, Department of Biological Sciences, Universidad de los Andes, Bogotá, D.C., Colombia
- Max Planck Tandem Group in Computational Biology, Universidad de los Andes, Bogotá, D.C., Colombia
- Molecular Genetics and Bioinformatics, Corporación CorpoGen, Bogotá, D.C., Colombia
| | - Adán Ramírez-Rojas
- Molecular Genetics and Bioinformatics, Corporación CorpoGen, Bogotá, D.C., Colombia
| | - Paola Porras
- Molecular Genetics and Antimicrobial Resistance Unit, International Center for Microbial Genomics, Universidad El Bosque, Bogotá, D.C., Colombia
| | - Boahemaa Adu-Oppong
- Center for Genome Science and Systems Biology, Washington University School of Medicine, St. Louis, MO, USA
| | - Ana-María Botero-Coy
- Research Institute for Pesticides and Water, University Jaume I, Castellón, Spain
| | - Félix Hernández
- Research Institute for Pesticides and Water, University Jaume I, Castellón, Spain
| | - Juan M Anzola
- Molecular Genetics and Bioinformatics, Corporación CorpoGen, Bogotá, D.C., Colombia
| | - Lorena Díaz
- Molecular Genetics and Antimicrobial Resistance Unit, International Center for Microbial Genomics, Universidad El Bosque, Bogotá, D.C., Colombia
| | - Gautam Dantas
- Center for Genome Science and Systems Biology, Washington University School of Medicine, St. Louis, MO, USA
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA
- Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, MO, USA
- Department of Biomedical Engineering, Washington University, St. Louis, MO, USA
| | - Alejandro Reyes
- Computational Biology and Microbial Ecology Group, Department of Biological Sciences, Universidad de los Andes, Bogotá, D.C., Colombia.
- Max Planck Tandem Group in Computational Biology, Universidad de los Andes, Bogotá, D.C., Colombia.
- Center for Genome Science and Systems Biology, Washington University School of Medicine, St. Louis, MO, USA.
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9
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Osorio M, Cañas A, Puerta J, Díaz L, Naranjo T, Ortiz I, Castro C. Ex Vivo and In Vivo Biocompatibility Assessment (Blood and Tissue) of Three-Dimensional Bacterial Nanocellulose Biomaterials for Soft Tissue Implants. Sci Rep 2019; 9:10553. [PMID: 31332259 PMCID: PMC6646330 DOI: 10.1038/s41598-019-46918-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 06/18/2019] [Indexed: 01/06/2023] Open
Abstract
Bacterial nanocellulose (BNC) is a promising biomedical material. However, the haemocompatibility (haemolysis and thrombogenicity) and acute and sub-chronic immune responses to three-dimensional (3D) BNC biomaterials have not been evaluated. Accordingly, this manuscript focused on the effect of 3D microporosity on BNC haemocompatibility and a comparison with 2D BNC architecture, followed by the evaluation of the immune response to 3D BNC. Blood ex vivo studies indicated that compared with other 2D and 3D BNC architectures, never-dried 2D BNC presented antihemolytic and antithrombogenic effects. Nevertheless, in vivo studies indicated that 3D BNC did not interfere with wound haemostasis and elicited a mild acute inflammatory response, not a foreign body or chronic inflammatory response. Moreover, compared with the polyethylene controls, the implant design with micropores ca. 60 µm in diameter showed a high level of collagen, neovascularization and low fibrosis. Cell/tissue infiltration increased to 91% after 12 weeks and was characterized by fibroblastic, capillary and extracellular matrix infiltration. Accordingly, 3D BNC biomaterials can be considered a potential implantable biomaterial for soft tissue augmentation or replacement.
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Affiliation(s)
- M Osorio
- School of Engineering, Universidad Pontificia Bolivariana, Circular 1 # 70-01, Medellín, Colombia
| | - A Cañas
- School of Engineering, Universidad Pontificia Bolivariana, Circular 1 # 70-01, Medellín, Colombia
| | - J Puerta
- School of Health Sciences, Universidad Pontificia Bolivariana, Calle 78 B # 72 A-109, Medellín, Colombia.,Medical and Experimental Mycology Group, Corporación para Investigaciones Biológicas, Carrera 72 A # 78 B-141, Medellín, Colombia
| | - L Díaz
- School of Health Sciences, Universidad Pontificia Bolivariana, Calle 78 B # 72 A-109, Medellín, Colombia
| | - T Naranjo
- School of Health Sciences, Universidad Pontificia Bolivariana, Calle 78 B # 72 A-109, Medellín, Colombia.,Medical and Experimental Mycology Group, Corporación para Investigaciones Biológicas, Carrera 72 A # 78 B-141, Medellín, Colombia
| | - I Ortiz
- School of Health Sciences, Universidad Pontificia Bolivariana, Calle 78 B # 72 A-109, Medellín, Colombia
| | - C Castro
- School of Engineering, Universidad Pontificia Bolivariana, Circular 1 # 70-01, Medellín, Colombia.
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10
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Riva E, Bove V, Villano F, Mori M, Córdoba C, Noria A, Petruskevicius P, Cardeza A, Díaz L. From guidelines to real world: results from the National Multiple Myeloma Registry in Uruguay on 222 newly diagnosed multiple myeloma patients from 2012 to 2015. Curr Med Res Opin 2019; 35:1197-1203. [PMID: 30621522 DOI: 10.1080/03007995.2019.1568091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Introduction: In the last decade, substantial improvements in the understanding of the biology of multiple myeloma and the development of novel therapeutic options have led to increased response rates, progression free survival and overall survival. In underdeveloped countries, it is a huge challenge to adapt for this evolution, both in diagnostic and therapeutic aspects. Methods: We conducted a retrospective, national analysis of all patients with newly diagnosed multiple myeloma in a recent period. Diagnostic and prognostic evaluation is carried out according to international recommendations in the majority of patients. Results: The clinical presentation at diagnosis is similar to those reported internationally, although with higher rates of anemia and severe renal failure. Most patients were diagnosed in advanced Durie-Salmon stage (80%), with high ISS score (48% ISS 3). Treatment, both in candidates and non-candidates for transplantation, is conditioned by a limited supply of possibilities, scarce availability of new drugs and absence of clinical trials. This determines lower results in response depth and survival. At 32 months, overall survival was 61.8%, with a statistical difference in favor of younger patients, standard-risk MM and those treated with novel drugs. No patient received antibacterial or antifungal prophylaxis while the majority received adequate antiviral prophylaxis. Infections were the main cause of death (29.7%), overcoming the disease itself. Conclusions: This analysis allows us to raise awareness about strengths and weaknesses in our management of MM patients. There is a need to promote earlier detection, improve supportive care and reduce infection mortality. Greater availability of evidence-based recommended treatment options is required. Access to clinical trials is warranted if care is to be improved.
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Affiliation(s)
- E Riva
- a Cátedra de Hematología , Hospital de Clínicas , Montevideo , Uruguay
- b Servicio de Hematología , Asociación Española Primera de Socorros Mutuos , Montevideo , Uruguay
- c Servicio de Hematología , Médica Uruguaya , Montevideo , Uruguay
- d Servicio de Hematología , Hospital Británico , Montevideo , Uruguay
| | - V Bove
- a Cátedra de Hematología , Hospital de Clínicas , Montevideo , Uruguay
- e Servicio de Hematología , Servicio Médico Integral , Montevideo , Uruguay
| | - F Villano
- a Cátedra de Hematología , Hospital de Clínicas , Montevideo , Uruguay
- f Servicio de Hematología , CASMU , Montevideo , Uruguay
| | - M Mori
- g Servicio de Hematología , Hospital Maciel , Montevideo , Uruguay
| | - C Córdoba
- h Servicio de Hematología , Asociación Médica de Salto , Salto , Uruguay
| | - A Noria
- i Departamento de Métodos Cuantitativos , Facultad de Medicina , Montevideo , Uruguay
| | - P Petruskevicius
- j Comisión Honoraria de Lucha Contra el Cáncer , Montevideo , Uruguay
| | - A Cardeza
- b Servicio de Hematología , Asociación Española Primera de Socorros Mutuos , Montevideo , Uruguay
| | - L Díaz
- a Cátedra de Hematología , Hospital de Clínicas , Montevideo , Uruguay
- e Servicio de Hematología , Servicio Médico Integral , Montevideo , Uruguay
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11
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García-Quiroz J, González-González ME, Díaz L, Ordaz-Rosado D, Segovia-Mendoza M, Prado-García H, Larrea F, García-Becerra R. Astemizole, an Inhibitor of Ether-�-Go-Go-1 Potassium Channel, Increases the Activity of the Tyrosine Kinase Inhibitor Gefitinib in Breast Cancer Cells. RIC 2019; 71:186-194. [DOI: 10.24875/ric.18002840] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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McTavish SM, Snow SJ, Cook EC, Pichon B, Coleman S, Coombs GW, Pang S, Arias CA, Díaz L, Boldock E, Davies S, Udukala M, Kearns AM, Siribaddana S, de Silva TI. Genomic and Epidemiological Evidence of a Dominant Panton-Valentine Leucocidin-Positive Methicillin Resistant Staphylococcus aureus Lineage in Sri Lanka and Presence Among Isolates From the United Kingdom and Australia. Front Cell Infect Microbiol 2019; 9:123. [PMID: 31080781 PMCID: PMC6497808 DOI: 10.3389/fcimb.2019.00123] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 04/08/2019] [Indexed: 11/30/2022] Open
Abstract
Objective: To undertake the first detailed genomic analysis of methicillin-resistant Staphylococcus aureus (MRSA) isolated in Sri Lanka. Methods: A prospective observational study was performed on 94 MRSA isolates collected over a 4 months period from the Anuradhapura Teaching Hospital, Sri Lanka. Screening for mecA, mecC, and the Panton-Valentine leucocidin (PVL)-associated lukS-PV/lukF-PV genes and molecular characterization by spa typing was undertaken. Whole genome sequencing (WGS) and phylogenetic analysis was performed on selected multilocus sequence type (MLST) clonal complex 5 (CC5) isolates from Sri Lanka, England, Australia, and Argentina. Results: All 94 MRSA harbored the mecA gene. Nineteen spa types belonging to nine MLST clonal complexes were identified. Where origin of the sample was recorded, most isolates were from skin and soft tissue infections (70/91; 76.9%), with fewer causing bacteremia (16/91; 17.6%), empyema (3/91; 3.3%) and osteomyelitis (2/91; 2.2%). Sixty two (65.9%) isolates were PVL positive with the majority (56 isolates; 90.3%) belonging to a dominant CC5 lineage. This lineage, PVL-positive ST5-MRSA-IVc, was associated with both community and hospital-onset infections. Based on WGS, representative PVL-positive ST5-MRSA-IVc isolates from Sri Lanka, England and Australia formed a single phylogenetic clade, suggesting wide geographical circulation. Conclusions: We present the most detailed genomic analysis of MRSA isolated in Sri Lanka to date. The analysis identified a PVL-positive ST5-MRSA-IVc that is prevalent among MRSA causing clinical infections in Sri Lanka. Furthermore, this clone was also found among isolates from the United Kingdom and Australia.
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Affiliation(s)
- Sharla M. McTavish
- Healthcare Associated Infections and Antimicrobial Resistance AMR Division, National Infection Service, Public Health England, London, United Kingdom
| | - Sarah J. Snow
- The Florey Institute for Host-Pathogen Interactions and Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
| | - Ellie C. Cook
- The Florey Institute for Host-Pathogen Interactions and Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
| | - Bruno Pichon
- Healthcare Associated Infections and Antimicrobial Resistance AMR Division, National Infection Service, Public Health England, London, United Kingdom
| | - Sarah Coleman
- Department of Microbiology, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, United Kingdom
| | - Geoffrey W. Coombs
- Antimicrobial Resistance and Infectious Diseases Research Laboratory, School of Veterinary Life Sciences, Murdoch University, Murdoch, WA, Australia
| | - Stanley Pang
- Antimicrobial Resistance and Infectious Diseases Research Laboratory, School of Veterinary Life Sciences, Murdoch University, Murdoch, WA, Australia
| | - Cesar A. Arias
- Center for Antimicrobial Resistance and Microbial Genomics and Division of Infectious Diseases, UTHealth, McGovern Medical School, Houston, TX, United States
- Center for Infectious Diseases, UTHealth School of Public Health, Houston, TX, United States
- Molecular Genetics and Antimicrobial Resistance Unit, International Center for Microbial Genomics, Universidad El Bosque, Bogota, Colombia
| | - Lorena Díaz
- Center for Antimicrobial Resistance and Microbial Genomics and Division of Infectious Diseases, UTHealth, McGovern Medical School, Houston, TX, United States
- Molecular Genetics and Antimicrobial Resistance Unit, International Center for Microbial Genomics, Universidad El Bosque, Bogota, Colombia
| | - Emma Boldock
- The Florey Institute for Host-Pathogen Interactions and Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
- Department of Microbiology, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, United Kingdom
| | - Steve Davies
- Department of Microbiology, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, United Kingdom
| | | | - Angela Marie Kearns
- Healthcare Associated Infections and Antimicrobial Resistance AMR Division, National Infection Service, Public Health England, London, United Kingdom
| | - Sisira Siribaddana
- Anuradhapura Teaching Hospital, Anuradhapura, Sri Lanka
- Faculty of Medicine and Allied Sciences, Rajarata University of Sri Lanka, Mihintale, Sri Lanka
| | - Thushan I. de Silva
- The Florey Institute for Host-Pathogen Interactions and Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
- Department of Medicine, Wright Fleming Institute, Imperial College London, London, United Kingdom
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13
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Gil Conde M, Seguro Á, Campos F, Albertos M, Iborra M, Díaz L. EP-1866 An interplay effect study comparing two different VMAT techniques for free-breathing moving targets. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)32286-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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González U, Schifter I, Díaz L, González-Macías C, Mejía-Centeno I, Sánchez-Reyna G. Assessment of the use of ethanol instead of MTBE as an oxygenated compound in Mexican regular gasoline: combustion behavior and emissions. Environ Monit Assess 2018; 190:700. [PMID: 30406412 DOI: 10.1007/s10661-018-7083-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 10/30/2018] [Indexed: 06/08/2023]
Abstract
The energy reforms implemented in Mexico promote the use of ethanol in gasoline but exclude the country's ozone nonattainment areas oxygenated with methyl-tert-butyl ether (MTBE) in view that further scientific studies are required. To address a potential implementation scenario in areas of ozone high VOC-sensitive regimes, the impact on performance and emissions characteristics between the regular MTBE fuel available and a formulated gasoline containing 10% v/v ethanol having similar Reid vapor pressure (RVP) were compared in a single cylinder spark-ignited engine and a set of tier I vehicles. Included in the assessment were the "criteria" pollutants (THC, CO, and NOx), toxic compounds, and speciated hydrocarbons in order to calculate the ozone-forming potential (OFP). The change in combustion speed of ethanol fuel vs. regular gasoline seems to be small and depends mainly on base gasoline formulation. Vehicle dynamometer testing showed no statistically significant differences in the average THC, CO, and NOx results when comparing both fuels. Statistically significant differences were seen in total speciated hydrocarbons, total carbonyls emitted, the increases in acetaldehyde emissions, and the decreases in OFP with E10. The results show roughly 20% increase in evaporative emissions when E10 is used, but the OFP of the emissions is lower than that of the Metropolitan Area of Mexico City fuel (MAMC). The increase in the oxygen content using ethanol fuel seems to have no deleterious effect on the vintage of vehicles tested. Taking into consideration that the evaporative emissions standard in Mexico is less stringent than that in other countries, the substitution of the actual regular gasoline for ethanol fuels should uphold the least volatile AA class in areas with ozone problems.
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Affiliation(s)
- U González
- Dirección de Investigación en Transformación de Hidrocarburos, Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas No. 152, San Bartolo Atepehuacan, 07730, Mexico City, Mexico.
| | - I Schifter
- Dirección de Investigación en Transformación de Hidrocarburos, Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas No. 152, San Bartolo Atepehuacan, 07730, Mexico City, Mexico
| | - L Díaz
- Dirección de Investigación en Transformación de Hidrocarburos, Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas No. 152, San Bartolo Atepehuacan, 07730, Mexico City, Mexico
| | - C González-Macías
- Dirección de Investigación en Transformación de Hidrocarburos, Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas No. 152, San Bartolo Atepehuacan, 07730, Mexico City, Mexico
| | - I Mejía-Centeno
- Dirección de Investigación en Transformación de Hidrocarburos, Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas No. 152, San Bartolo Atepehuacan, 07730, Mexico City, Mexico
| | - G Sánchez-Reyna
- Dirección de Investigación en Transformación de Hidrocarburos, Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas No. 152, San Bartolo Atepehuacan, 07730, Mexico City, Mexico
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15
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Martínez-Ávila JC, García Bartolomé A, García I, Dapía I, Tong HY, Díaz L, Guerra P, Frías J, Carcás Sansuan AJ, Borobia AM. Correction to: Pharmacometabolomics applied to zonisamide pharmacokinetic parameter prediction. Metabolomics 2018; 14:87. [PMID: 30834989 DOI: 10.1007/s11306-018-1378-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The original version of this article contains a mistake.
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Affiliation(s)
- J C Martínez-Ávila
- Clinical Pharmacology Department, La Paz University Hospital, School of Medicine, IdiPAZ, Autonomous University of Madrid, Madrid, Spain.
| | - A García Bartolomé
- Clinical Pharmacology Department, La Paz University Hospital, School of Medicine, IdiPAZ, Autonomous University of Madrid, Madrid, Spain
| | - I García
- Clinical Pharmacology Department, La Paz University Hospital, School of Medicine, IdiPAZ, Autonomous University of Madrid, Madrid, Spain
| | - I Dapía
- Medical and Molecular Genetics Institute (INGEMM), La Paz University Hospital, Rare Diseases Networking Biomedical Research Center (CIBERER), ISCIII, Madrid, Spain
| | - Hoi Y Tong
- Clinical Pharmacology Department, La Paz University Hospital, School of Medicine, IdiPAZ, Autonomous University of Madrid, Madrid, Spain
| | - L Díaz
- Clinical Pharmacology Department, La Paz University Hospital, School of Medicine, IdiPAZ, Autonomous University of Madrid, Madrid, Spain
| | - P Guerra
- Clinical Pharmacology Department, La Paz University Hospital, School of Medicine, IdiPAZ, Autonomous University of Madrid, Madrid, Spain
| | - J Frías
- Clinical Pharmacology Department, La Paz University Hospital, School of Medicine, IdiPAZ, Autonomous University of Madrid, Madrid, Spain
| | - A J Carcás Sansuan
- Clinical Pharmacology Department, La Paz University Hospital, School of Medicine, IdiPAZ, Autonomous University of Madrid, Madrid, Spain.
| | - A M Borobia
- Clinical Pharmacology Department, La Paz University Hospital, School of Medicine, IdiPAZ, Autonomous University of Madrid, Madrid, Spain
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Martínez-Ávila JC, García Bartolomé A, García I, Dapía I, Tong HY, Díaz L, Guerra P, Frías J, Carcás Sansuan AJ, Borobia AM. Pharmacometabolomics applied to zonisamide pharmacokinetic parameter prediction. Metabolomics 2018; 14:70. [PMID: 30830352 DOI: 10.1007/s11306-018-1365-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 04/25/2018] [Indexed: 10/16/2022]
Abstract
INTRODUCTION Zonisamide is a new-generation anticonvulsant antiepileptic drug metabolized primarily in the liver, with subsequent elimination via the renal route. OBJECTIVES Our objective was to evaluate the utility of pharmacometabolomics in the detection of zonisamide metabolites that could be related to its disposition and therefore, to its efficacy and toxicity. METHODS This study was nested to a bioequivalence clinical trial with 28 healthy volunteers. Each participant received a single dose of zonisamide on two separate occasions (period 1 and period 2), with a washout period between them. Blood samples of zonisamide were obtained from all patients at baseline for each period, before volunteers were administered any medication, for metabolomics analysis. RESULTS After a Lasso regression was applied, age, height, branched-chain amino acids, steroids, triacylglycerols, diacyl glycerophosphoethanolamine, glycerophospholipids susceptible to methylation, phosphatidylcholines with 20:4 FA (arachidonic acid) and cholesterol ester and lysophosphatidylcholine were obtained in both periods. CONCLUSION To our knowledge, this is the only research study to date that has attempted to link basal metabolomic status with pharmacokinetic parameters of zonisamide.
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Affiliation(s)
- J C Martínez-Ávila
- Clinical Pharmacology Department, La Paz University Hospital, School of Medicine, IdiPAZ, Autonomous University of Madrid, Madrid, Spain.
| | - A García Bartolomé
- Clinical Pharmacology Department, La Paz University Hospital, School of Medicine, IdiPAZ, Autonomous University of Madrid, Madrid, Spain
| | - I García
- Clinical Pharmacology Department, La Paz University Hospital, School of Medicine, IdiPAZ, Autonomous University of Madrid, Madrid, Spain
| | - I Dapía
- Medical and Molecular Genetics Institute (INGEMM), La Paz University Hospital, Rare Diseases Networking Biomedical Research Center (CIBERER), ISCIII, Madrid, Spain
| | - Hoi Y Tong
- Clinical Pharmacology Department, La Paz University Hospital, School of Medicine, IdiPAZ, Autonomous University of Madrid, Madrid, Spain
| | - L Díaz
- Clinical Pharmacology Department, La Paz University Hospital, School of Medicine, IdiPAZ, Autonomous University of Madrid, Madrid, Spain
| | - P Guerra
- Clinical Pharmacology Department, La Paz University Hospital, School of Medicine, IdiPAZ, Autonomous University of Madrid, Madrid, Spain
| | - J Frías
- Clinical Pharmacology Department, La Paz University Hospital, School of Medicine, IdiPAZ, Autonomous University of Madrid, Madrid, Spain
| | - A J Carcás Sansuan
- Clinical Pharmacology Department, La Paz University Hospital, School of Medicine, IdiPAZ, Autonomous University of Madrid, Madrid, Spain.
| | - A M Borobia
- Clinical Pharmacology Department, La Paz University Hospital, School of Medicine, IdiPAZ, Autonomous University of Madrid, Madrid, Spain
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Bustos F, Sepúlveda H, Prieto CP, Carrasco M, Díaz L, Palma J, Lattus J, Montecino M, Palma V. Runt-Related Transcription Factor 2 Induction During Differentiation of Wharton's Jelly Mesenchymal Stem Cells to Osteoblasts Is Regulated by Jumonji AT-Rich Interactive Domain 1B Histone Demethylase. Stem Cells 2017; 35:2430-2441. [DOI: 10.1002/stem.2704] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 08/26/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Francisco Bustos
- Laboratory of Stem Cells and Development; Faculty of Sciences, Universidad de Chile, Ñuñoa; Santiago Chile
- FONDAP Center for Genome Regulation.; Santiago Chile
- Sir James Black Centre, School of Life Sciences; University of Dundee; Dundee United Kingdom
| | - Hugo Sepúlveda
- FONDAP Center for Genome Regulation.; Santiago Chile
- Center for Biomedical Research, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello.; Santiago Chile
| | - Catalina P. Prieto
- Laboratory of Stem Cells and Development; Faculty of Sciences, Universidad de Chile, Ñuñoa; Santiago Chile
- FONDAP Center for Genome Regulation.; Santiago Chile
| | - Margarita Carrasco
- FONDAP Center for Genome Regulation.; Santiago Chile
- Center for Biomedical Research, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello.; Santiago Chile
| | - Lorena Díaz
- Laboratory of Stem Cells and Development; Faculty of Sciences, Universidad de Chile, Ñuñoa; Santiago Chile
| | - José Palma
- Laboratory of Stem Cells and Development; Faculty of Sciences, Universidad de Chile, Ñuñoa; Santiago Chile
| | - José Lattus
- Department of Obstetrics and Gynecology; Dr. Luis Tisné Brousse Hospital, Universidad de Chile, Campus Oriente.; Peñalolén Santiago Chile
| | - Martín Montecino
- FONDAP Center for Genome Regulation.; Santiago Chile
- Center for Biomedical Research, Faculty of Biological Sciences and Faculty of Medicine, Universidad Andres Bello.; Santiago Chile
| | - Verónica Palma
- Laboratory of Stem Cells and Development; Faculty of Sciences, Universidad de Chile, Ñuñoa; Santiago Chile
- FONDAP Center for Genome Regulation.; Santiago Chile
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Tamayo P, Martín A, Díaz L, Cabrero M, García R, García-Talavera P, Caballero D. 18 F-FDG PET/CT in the clinical management of patients with lymphoma. Rev Esp Med Nucl Imagen Mol 2017. [DOI: 10.1016/j.remnie.2017.06.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Berge E, Otón E, Reina Z, Díaz L, Márquez A, Cejas L, Acosta S, Pérez F. Predictors of Poor Prognosis in Recurrent Hepatitis C After Liver Transplantation. Transplant Proc 2017; 48:2997-2999. [PMID: 27932129 DOI: 10.1016/j.transproceed.2016.07.043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 07/27/2016] [Indexed: 02/07/2023]
Abstract
BACKGROUND Hepatitis C is a common indication for liver transplantation (LT). Hepatitis C virus (HCV) recurrence is universal in viremic patients. This recurrence is frequently very aggressive, with graft loss in less than 5 years. Our aim is to detect which factors are related to worse fibrosis at 1 year post-LT. PATIENTS AND METHODS Records of all HCV-positive transplanted patients in Hospital Universitario Nuestra Señora de la Candelaria from 1996 to 2014 were collected. The variables analyzed were donor and recipient age and gender, hypertension, diabetes, viral genotype, viral load at LT, hepatocellular carcinoma in the explant, anticoagulation or antiplatelet treatment, year of transplantation, and mean levels of tacrolimus in the first month. Severe recurrence was defined as fibrosis F3 by biopsy, liver stiffness > 9.5 kPa by transient elastography, or hepatic venous pressure gradient > 5 mm Hg at 1 year post-LT. Univariate and multivariate analyses were performed. RESULTS From a sample of 112 patients, 88 patients met inclusion criteria. Mean recipient age was 52.8 ± 8.0 years and 70.5% were men. Mean donor age was 46.4 ± 16.1 years and 59.1% were men. Severe recurrence occurred in 23.9%. Univariate analyses showed 3 variables were statistically significant: donor age (P = .03), recipient age (P = .008), and presence of hepatocellular carcinoma (P = .01). Only the 2 first variables remained significant in the multivariate model (P = .009 and P = .044 respectively). Hepatocellular carcinoma was probably related to older recipients becoming a confounding factor. CONCLUSIONS In our study, donor and recipient age both conferred a worse prognosis in terms of fibrosis progression in patients with liver transplant due to HCV.
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Affiliation(s)
- E Berge
- Liver Transplantation Unit, Hospital Universitario Nuestra Señora de la Candelaria, Santa Cruz de Tenerife, Spain
| | - E Otón
- Liver Transplantation Unit, Hospital Universitario Nuestra Señora de la Candelaria, Santa Cruz de Tenerife, Spain.
| | - Z Reina
- Occupational Medicine Unit, Hospital Universitario de Canarias, Santa Cruz de Tenerife, Spain
| | - L Díaz
- Liver Transplantation Unit, Hospital Universitario Nuestra Señora de la Candelaria, Santa Cruz de Tenerife, Spain
| | - A Márquez
- Liver Transplantation Unit, Hospital Universitario Nuestra Señora de la Candelaria, Santa Cruz de Tenerife, Spain
| | - L Cejas
- Liver Transplantation Unit, Hospital Universitario Nuestra Señora de la Candelaria, Santa Cruz de Tenerife, Spain
| | - S Acosta
- Liver Transplantation Unit, Hospital Universitario Nuestra Señora de la Candelaria, Santa Cruz de Tenerife, Spain
| | - F Pérez
- Liver Transplantation Unit, Hospital Universitario Nuestra Señora de la Candelaria, Santa Cruz de Tenerife, Spain
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Tamayo P, Martín A, Díaz L, Cabrero M, García R, García-Talavera P, Caballero D. 18F-FDG PET/CT in the clinical management of patients with lymphoma. Rev Esp Med Nucl Imagen Mol 2017; 36:312-321. [PMID: 28483374 DOI: 10.1016/j.remn.2017.03.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 03/07/2017] [Accepted: 03/13/2017] [Indexed: 01/01/2023]
Abstract
The aim of this work was to review the current recommendations for staging and response assessment of patients with Hodgkin lymphoma (HL) and non-Hodgkin lymphoma (NHL) in routine clinical practice after chemotherapy and/or stem cell transplantation. A five-point scale (5-PS) from the First International Workshop on PET in Lymphoma in Deauville, France, in 2009, was recommended as the standard tool to score imaging to assess treatment response in patients with lymphoma using 18F-Fluorodeoxyglucose (FDG) PET/CT. Following the recommendations of the 11th and 12th International Conferences on Malignant Lymphoma held in Lugano (Switzerland), in 2011 and 2013, respectively, a consensus (the so-called Lugano Classification) was reached regarding the use of PET/CT for staging and response assessment in FDG-avid lymphomas. As a result, 18F-FDG PET/CT was formally incorporated into standard staging for FDG-avid lymphomas. A bone marrow biopsy is no longer indicated for the routine staging of HL and most diffuse large B-cell lymphomas. PET/CT will be used to assess response in FDG-avid histologies using the 5-point scale. The recent introduction of biological agents with immune mechanisms requires flexibility in interpretations of the Lugano criteria due to tumour flare or a pseudo-progression effect produced by these agents. Provisional criteria have been proposed (Lymphoma Response to Immunomodulatory Therapy Criteria) with the introduction of the term 'Indeterminate Response' in order to identify this phenomenon until confirmed as flare/pseudoprogression or true progression. All these recommendations will improve evaluations of patients with lymphoma, and allow comparison of results from clinical practice and trials.
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Affiliation(s)
- P Tamayo
- Servicio de Medicina Nuclear, Hospital Universitario de Salamanca, Salamanca, España; Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, España.
| | - A Martín
- Servicio de Hematología, Hospital Universitario de Salamanca, Salamanca, España; Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, España
| | - L Díaz
- Servicio de Medicina Nuclear, Hospital Universitario de Salamanca, Salamanca, España
| | - M Cabrero
- Servicio de Hematología, Hospital Universitario de Salamanca, Salamanca, España; Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, España
| | - R García
- Servicio de Hematología, Hospital Universitario de Salamanca, Salamanca, España; Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, España
| | - P García-Talavera
- Servicio de Medicina Nuclear, Hospital Universitario de Salamanca, Salamanca, España
| | - D Caballero
- Servicio de Hematología, Hospital Universitario de Salamanca, Salamanca, España; Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, España
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Salas C, Gutiérrez L, Garduño S, Macias M, Ingunza L, Villanego I, Díaz V, Gonzalez E, Díaz L, Ureña A, Quiñones L, Jaén J. EP-1312: Long terms outcome in prostate cancer with image guided and intensity modulated radiation therapy. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31747-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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22
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Martínez-Bonet M, González-Serna A, Clemente MI, Morón-López S, Díaz L, Navarro M, Puertas MC, Leal M, Ruiz-Mateos E, Martinez-Picado J, Muñoz-Fernández MA. Relationship between CCR5 (WT/Δ32) heterozygosity and HIV-1 reservoir size in adolescents and young adults with perinatally acquired HIV-1 infection. Clin Microbiol Infect 2016; 23:318-324. [PMID: 28042001 DOI: 10.1016/j.cmi.2016.12.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Revised: 12/09/2016] [Accepted: 12/18/2016] [Indexed: 11/28/2022]
Abstract
BACKGROUND Several host factors contribute to human immunodeficiency virus (HIV) disease progression in the absence of combination antiretroviral therapy (cART). Among them, the CC-chemokine receptor 5 (CCR5) is known to be the main co-receptor used by HIV-1 to enter target cells during the early stages of an HIV-1 infection. OBJECTIVE We evaluated the association of CCR5(WT/Δ32) heterozygosity with HIV-1 reservoir size, lymphocyte differentiation, activation and immunosenescence in adolescents and young adults with perinatally acquired HIV infection receiving cART. METHODS CCR5 genotype was analysed in 242 patients with vertically transmitted HIV-1 infection from Paediatric Spanish AIDS Research Network Cohort (coRISpe). Proviral HIV-1 DNA was quantified by digital-droplet PCR, and T-cell phenotype was evaluated by flow cytometry in a subset of 24 patients (ten with CCR5(Δ32/WT) genotype and 14 with CCR5(WT/WT) genotype). RESULTS Twenty-three patients were heterozygous for the Δ32 genotype but none was homozygous for the mutated CCR5 allele. We observed no difference in the HIV-1 reservoir size (455 and 578 copies of HIV-1 DNA per million CD4+ T cells in individuals with CCR5(WT/WT) and CCR5(Δ32/WT) genotypes, respectively; p 0.75) or in the immune activation markers between both genotype groups. However, we found that total HIV-1 DNA in CD4+ T cells correlated with the percentage of memory CD4+ T cells: a direct correlation in CCR5(WT/Δ32) patients but an inverse correlation in those with the CCR5(WT/WT) genotype. CONCLUSIONS This finding suggests a differential distribution of the viral reservoir compartment in CCR5(WT/Δ32) patients with perinatal HIV infection, which is a characteristic that may affect the design of strategies for reservoir elimination.
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Affiliation(s)
- M Martínez-Bonet
- Laboratory of Immuno Molecular Biology, Section of Immunology, Hospital General Universitario Gregorio Marañon, IiSGM, Madrid, Spain; Spanish HIV HGM BioBank, Madrid, Spain; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - A González-Serna
- Laboratory of Immuno Molecular Biology, Section of Immunology, Hospital General Universitario Gregorio Marañon, IiSGM, Madrid, Spain; Laboratory of Immunovirology, Clinic Unit of Infectious Diseases, Microbiology and Preventive Medicine, Institute of Biomedicine of Seville, IBiS, Virgen del Rocío University Hospital/CSIC/University of Seville, Seville, Spain
| | - M I Clemente
- Laboratory of Immuno Molecular Biology, Section of Immunology, Hospital General Universitario Gregorio Marañon, IiSGM, Madrid, Spain; Spanish HIV HGM BioBank, Madrid, Spain; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - S Morón-López
- AIDS Research Institute IrsiCaixa, Institut d'Investigació en Ciències de la Salut Germans Trias i Pujol, Universitat Autònoma de Barcelona, Badalona, Spain
| | - L Díaz
- Laboratory of Immuno Molecular Biology, Section of Immunology, Hospital General Universitario Gregorio Marañon, IiSGM, Madrid, Spain; Spanish HIV HGM BioBank, Madrid, Spain; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - M Navarro
- Department of Infection Disease Section, Paediatric Service, Hospital General Universitario Gregorio Marañón, Madrid, Spain
| | - M C Puertas
- AIDS Research Institute IrsiCaixa, Institut d'Investigació en Ciències de la Salut Germans Trias i Pujol, Universitat Autònoma de Barcelona, Badalona, Spain
| | - M Leal
- Laboratory of Immunovirology, Clinic Unit of Infectious Diseases, Microbiology and Preventive Medicine, Institute of Biomedicine of Seville, IBiS, Virgen del Rocío University Hospital/CSIC/University of Seville, Seville, Spain
| | - E Ruiz-Mateos
- Laboratory of Immunovirology, Clinic Unit of Infectious Diseases, Microbiology and Preventive Medicine, Institute of Biomedicine of Seville, IBiS, Virgen del Rocío University Hospital/CSIC/University of Seville, Seville, Spain
| | - J Martinez-Picado
- AIDS Research Institute IrsiCaixa, Institut d'Investigació en Ciències de la Salut Germans Trias i Pujol, Universitat Autònoma de Barcelona, Badalona, Spain; Universitat de Vic - Universitat Central de Catalunya (UVic-UCC), Barcelona, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain.
| | - M A Muñoz-Fernández
- Laboratory of Immuno Molecular Biology, Section of Immunology, Hospital General Universitario Gregorio Marañon, IiSGM, Madrid, Spain; Spanish HIV HGM BioBank, Madrid, Spain; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain.
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Soler B, Castellares C, Viver S, Díaz L, Gómez R, Ruíz E. [Randomised clinical trial to evaluate the efficacy and safety of a new pediculicide made with saponified olive oil in the eradication of Pediculus humanus capitis]. Semergen 2016; 43:91-99. [PMID: 27255407 DOI: 10.1016/j.semerg.2016.03.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Accepted: 03/06/2016] [Indexed: 11/26/2022]
Abstract
INTRODUCTION The aim of the study was to evaluate the efficacy and safety of a new pediculicide in the eradication of Pediculus humanus capitis infestation. MATERIAL AND METHODS A randomised clinical trial was designed, in which children aged between 5 and 15 years diagnosed with pediculosis were selected. Treatment was administered on days 1 and 7 after selection, and they were evaluated in 4 visits (day 2, 7, 9, and 14). The product under evaluation with saponified olive oil was Inex Pediculicide Soap®, which was compared with Paranix®, with a similar mechanism of action. The primary efficacy endpoint was the eradication of the parasite by day 14 (louse-free rate), using an intention to treat analysis. RESULTS Six paediatricians from 5 Primary Health Care centres in the Community of Madrid (Spain) and one private clinic participated in the study. A total of 45 children were included, of which 75.6% were girls (n=34). The mean age was 7.1 years (95% CI 6.3-7.9). The large majority (80%) were middle class, and 82.2% had a history of previous pediculosis. The efficacy at 14 days was 76.2% (95% CI 52.8-91.8) in the group treated with Inex Pediculicide Soap® group, and 79.2% (95% CI 57.9-92.9) in Paranix® group (NNT=33.3). No adverse effects were observed with treatment. CONCLUSIONS The 2 products were effective and safe in the eradication therapy Pediculus humanus capitis, with no statistical differences.
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Affiliation(s)
- B Soler
- Departamento Médico, E-C-BIO, S. L., Madrid, España.
| | - C Castellares
- Centro de Salud Santa Mónica, Rivas-Vaciamadrid, Madrid, España
| | - S Viver
- Centro de Salud Valle de la Oliva, Majadahonda, Madrid, España
| | - L Díaz
- Clínica CEMECO, Torrelodones, Madrid, España
| | - R Gómez
- Centro de Salud Santa Mónica, Rivas-Vaciamadrid, Madrid, España
| | - E Ruíz
- Centro de Salud María Jesús Hereza Cuéllar, Leganés, Madrid, España
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Cázares-Ordoñez V, González-Duarte RJ, Díaz L, Ishizawa M, Uno S, Ortíz V, Ordoñez-Sánchez ML, Makishima M, Larrea F, Avila E. A cis-acting element in the promoter of human ether à go-go 1 potassium channel gene mediates repression by calcitriol in human cervical cancer cells. Biochem Cell Biol 2014; 93:94-101. [PMID: 25495694 DOI: 10.1139/bcb-2014-0073] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The human ether à go-go 1 potassium channel (hEAG1) is required for cell cycle progression and proliferation of cancer cells. Inhibitors of hEAG1 activity and expression represent potential therapeutic drugs in cancer. Previously, we have shown that hEAG1 expression is downregulated by calcitriol in a variety of cancer cells. Herein, we provided evidence on the regulatory mechanism involved in such repressive effect in cells derived from human cervical cancer. Our results indicate that repression by calcitriol occurs at the transcriptional level and involves a functional negative vitamin D response element (nVDRE) E-box type in the hEAG1 promoter. The described mechanism in this work implies that a protein complex formed by the vitamin D receptor-interacting repressor, the vitamin D receptor, the retinoid X receptor, and the Williams syndrome transcription factor interact with the nVDRE in the hEAG1 promoter in the absence of ligand. Interestingly, all of these transcription factors except the vitamin D receptor-interacting repressor are displaced from hEAG1 promoter in the presence of calcitriol. Our results provide novel mechanistic insights into calcitriol mode of action in repressing hEAG1 gene expression.
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Affiliation(s)
- V Cázares-Ordoñez
- a Department of Reproductive Biology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Vasco de Quiroga # 15, Col. Sección XVI, México, D.F. 14000, México
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Schifter I, Díaz L, Rodríguez R, González-Macías C. The contribution of evaporative emissions from gasoline vehicles to the volatile organic compound inventory in Mexico City. Environ Monit Assess 2014; 186:3969-3983. [PMID: 24526614 DOI: 10.1007/s10661-014-3672-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Accepted: 01/28/2014] [Indexed: 06/03/2023]
Abstract
The strategy for decreasing volatile organic compound emissions in Mexico has been focused much more on tailpipe emissions than on evaporative emissions, so there is very little information on the contribution of evaporative emissions to the total volatile organic compound inventory. We examined the magnitudes of exhaust and evaporative volatile organic compound emissions, and the species emitted, in a representative fleet of light-duty gasoline vehicles in the Metropolitan Area of Mexico City. The US "FTP-75" test protocol was used to estimate volatile organic compound emissions associated with diurnal evaporative losses, and when the engine is started and a journey begins. The amount and nature of the volatile organic compounds emitted under these conditions have not previously been accounted in the official inventory of the area. Evaporative emissions from light-duty vehicles in the Metropolitan Area of Mexico City were estimated to be 39 % of the total annual amount of hydrocarbons emitted. Vehicles built before 1992 (16 % of the fleet) were found to be responsible for 43 % of the total hydrocarbon emissions from exhausts and 31 % of the evaporative emissions of organic compounds. The relatively high amounts of volatile organic compounds emitted from older vehicles found in this study show that strong emission controls need to be implemented in order to decrease the contribution of evaporative emissions of this fraction of the fleet.
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Affiliation(s)
- I Schifter
- Instituto Mexicano del Petróleo, Dirección de Investigación y Posgrado, Eje Central Lázaro Cárdenas No. 152, San Bartolo Atepehuacan, 07730, México, D.F., Mexico,
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26
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Abad-Fernández M, Gutiérrez C, Madrid N, Hernández-Novoa B, Díaz L, Muñoz-Fernández MA, Moreno S, Vallejo A. Expression of gut-homing β7 receptor on T cells: surrogate marker for microbial translocation in suppressed HIV-1-infected patients? HIV Med 2014; 16:15-23. [PMID: 24831847 DOI: 10.1111/hiv.12167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/08/2014] [Indexed: 11/30/2022]
Abstract
OBJECTIVES In view of the fact that mucosal damage associated with HIV-1 infection leads to microbial translocation despite successful antiretroviral treatment, we analysed microbial translocation and expression of the gut-homing β7 receptor on peripheral T cells in HIV-1-infected individuals. METHODS Fifteen long-term suppressed HIV-1-infected patients, of whom seven had their treatment intensified with maraviroc and eight with raltegravir, were included in the study. Samples at baseline, at week 48 of intensification, and at weeks 12 and 24 after deintensification were analysed for soluble CD14, lipopolysaccharide (LPS), LPS-binding protein, gut-homing β7 receptor and T-cell subsets. RESULTS The increases in both microbial translocation and expression of the gut-homing β7 receptor on activated CD8 T cells found during maraviroc intensification were reduced after deintensification. Moreover, the correlations between activated β7(+) T cells and LPS levels found during intensification with maraviroc (P = 0.036 and P = 0.010, respectively) were lost during deintensification. In contrast, microbial translocation was stable during raltegravir intensification, with the exception of decreased LPS levels and activated CD4 β7(+) T cells, which reverted to baseline values after deintensification. CONCLUSIONS Microbial translocation is an important factor in gut immune activation and mucosa inflammation, as evidenced by the association between the dynamics of microbial translocation and activated T cells expressing the gut-homing β7 receptor. The recruitment of activated β7(+) T cells to the gut tract when alteration of microbial translocation is maximum may be the major mechanism for recovery of mucosal integrity.
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Affiliation(s)
- M Abad-Fernández
- Department of Infectious Diseases, Health Research Institute Ramon y Cajal (IRYCIS), University Hospital Ramon y Cajal, Madrid, Spain
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Rincón S, Panesso D, Díaz L, Carvajal LP, Reyes J, Munita JM, Arias CA. [Resistance to "last resort" antibiotics in Gram-positive cocci: The post-vancomycin era]. Biomedica 2014; 34 Suppl 1:191-208. [PMID: 24968051 PMCID: PMC4435674 DOI: 10.1590/s0120-41572014000500022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Accepted: 01/31/2014] [Indexed: 06/03/2023]
Abstract
New therapeutic alternatives have been developed in the last years for the treatment of multidrug-resistant Gram-positive infections. Infections caused by methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant enterococci (VRE) are considered a therapeutic challenge due to failures and lack of reliable antimicrobial options. Despite concerns related to the use of vancomycin in the treatment of severe MRSA infections in specific clinical scenarios, there is a paucity of solid clinical evidence that support the use of alternative agents (when compared to vancomycin). Linezolid, daptomycin and tigecycline are antibiotics approved in the last decade and newer cephalosporins (such as ceftaroline and ceftobiprole) and novel glycopeptides (dalvavancin, telavancin and oritavancin) have reached clinical approval or are in the late stages of clinical development. This review focuses on discussing these newer antibiotics used in the "post-vancomycin" era with emphasis on relevant chemical characteristics, spectrum of antimicrobial activity, mechanisms of action and resistance, as well as their clinical utility.
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Affiliation(s)
- Sandra Rincón
- Unidad de Genética y Resistencia Antimicrobiana (UGRA), Universidad El Bosque, Bogotá, D.C., Colombia
| | - Diana Panesso
- Unidad de Genética y Resistencia Antimicrobiana (UGRA), Universidad El Bosque, Bogotá, D.C., Colombia
- University of Texas Medical School at Houston, Houston, TX, USA
| | - Lorena Díaz
- Unidad de Genética y Resistencia Antimicrobiana (UGRA), Universidad El Bosque, Bogotá, D.C., Colombia
| | - Lina P. Carvajal
- Unidad de Genética y Resistencia Antimicrobiana (UGRA), Universidad El Bosque, Bogotá, D.C., Colombia
| | - Jinnethe Reyes
- Unidad de Genética y Resistencia Antimicrobiana (UGRA), Universidad El Bosque, Bogotá, D.C., Colombia
- University of Texas Medical School at Houston, Houston, TX, USA
| | - José M. Munita
- University of Texas Medical School at Houston, Houston, TX, USA
- Clínica Alemana de Santiago, Universidad del Desarrollo, Santiago de Chile, Chile
| | - César A. Arias
- Unidad de Genética y Resistencia Antimicrobiana (UGRA), Universidad El Bosque, Bogotá, D.C., Colombia
- University of Texas Medical School at Houston, Houston, TX, USA
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Leiva E, Mujica V, Orrego R, Wehinger S, Soto A, Icaza G, Vásquez M, Díaz L, Andrews M, Arredondo M. Subjects with impaired fasting glucose: evolution in a period of 6 years. J Diabetes Res 2014; 2014:710370. [PMID: 25215305 PMCID: PMC4158147 DOI: 10.1155/2014/710370] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 08/04/2014] [Accepted: 08/05/2014] [Indexed: 12/25/2022] Open
Abstract
AIM To study the evolution of impaired fasting glucose (IFG), considering glucose and HbA1c levels and risk factors associated, in a period of 6 years. METHODS We studied 94 subjects with impaired fasting glucose (IFG) that were diagnosed in 2005 and followed up to 2012. Glucose and HbA1c levels were determined. A descriptive analysis of contingence charts was performed in order to study the evolution in the development of type-2 diabetes mellitus (T2DM). RESULTS Twenty-eight of ninety-four subjects became T2DM; 51/94 remained with IFG; and 20/94 presented normal fasting glucose. From the 28 diabetic subjects, 9 had already developed diabetes and were under treatment with oral hypoglycemic agents; 5 were diagnosed with plasma glucose < 126 mg/dL, but with HbA1c over 6.5%. In those who developed diabetes, 15/28 had a family history of T2DM in first relative degree. Also, diabetic subjects had a BMI significantly higher than nodiabetics (t test: P < 0.01). The individuals that in 2005 had the highest BMI are those who currently have diabetes. CONCLUSION The IFG constitutes a condition of high risk of developing T2DM in a few years, especially over 110 mg/dL and in obesity patients.
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Affiliation(s)
- E. Leiva
- Programa de Investigación de Excelencia Interdisciplinaria en Envejecimiento Saludable (PIEI-ES), Departamento de Bioquímica Clínica e Inmunohematología, Facultad de Ciencias de la Salud, Universidad de Talca, 3465548 Talca, Chile
- *E. Leiva:
| | - V. Mujica
- Facultad de Medicina, Universidad Católica del Maule, Avenida San Miguel 3605, 3480112 Talca, Chile
| | - R. Orrego
- Programa de Investigación de Excelencia Interdisciplinaria en Envejecimiento Saludable (PIEI-ES), Departamento de Bioquímica Clínica e Inmunohematología, Facultad de Ciencias de la Salud, Universidad de Talca, 3465548 Talca, Chile
| | - S. Wehinger
- Programa de Investigación de Excelencia Interdisciplinaria en Envejecimiento Saludable (PIEI-ES), Departamento de Bioquímica Clínica e Inmunohematología, Facultad de Ciencias de la Salud, Universidad de Talca, 3465548 Talca, Chile
| | - A. Soto
- Programa de Investigación de Excelencia Interdisciplinaria en Envejecimiento Saludable (PIEI-ES), Instituto de Matemáticas y Física, Universidad de Talca, Chile 2 Norte 685, 3465548 Talca, Chile
| | - G. Icaza
- Programa de Investigación de Excelencia Interdisciplinaria en Envejecimiento Saludable (PIEI-ES), Instituto de Matemáticas y Física, Universidad de Talca, Chile 2 Norte 685, 3465548 Talca, Chile
| | - M. Vásquez
- Programa de Investigación de Excelencia Interdisciplinaria en Envejecimiento Saludable (PIEI-ES), Departamento de Bioquímica Clínica e Inmunohematología, Facultad de Ciencias de la Salud, Universidad de Talca, 3465548 Talca, Chile
| | - L. Díaz
- Programa de Investigación de Excelencia Interdisciplinaria en Envejecimiento Saludable (PIEI-ES), Departamento de Bioquímica Clínica e Inmunohematología, Facultad de Ciencias de la Salud, Universidad de Talca, 3465548 Talca, Chile
| | - M. Andrews
- Laboratorio de Micronutrientes, INTA, Universidad de Chile, El Líbano 5524, Macul, 7830490 Santiago, Chile
| | - M. Arredondo
- Laboratorio de Micronutrientes, INTA, Universidad de Chile, El Líbano 5524, Macul, 7830490 Santiago, Chile
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Salas C, Gutiérrez L, De Ingunza L, González E, Díaz L, Villanego I, Díaz V, Jaén J. PO-0738: Imagen guided radiotherapy in prostate cancer: Interobservator variability with CBCT Mv and fiducial markers. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)30856-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Ramírez A, Hinojosa LM, Gonzales JDJ, Montante-Montes D, Martínez-Benítez B, Aguilar-Guadarrama R, Gamboa-Domínguez A, Morales F, Carrillo-García A, Lizano M, García-Becerra R, Díaz L, Vázquez-Sánchez AY, Camacho J. KCNH1 potassium channels are expressed in cervical cytologies from pregnant patients and are regulated by progesterone. Reproduction 2013; 146:615-23. [DOI: 10.1530/rep-13-0318] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Potassium voltage-gated channel, subfamily H (eag-related), member 1 (KCNH1) potassium channels are potential tumour markers and cancer therapeutic targets and are up-regulated by oestrogens and human papilloma virus (HPV) oncogenes. However, the role of KCNH1 in normal tissues is poorly understood, and its expression in pregnancy is unknown. We wondered whether KCNH1 channels are expressed in cervical cells from pregnant patients and whether progesterone (P4) regulates KCNH1. The association with HPV was also investigated. KCNH1 protein expression was studied by immunocytochemistry in liquid-based cervical cytologies; 93 samples were obtained from pregnant patients at different trimesters, and 15 samples were obtained from non-pregnant women (controls). The presence ofHPVwas studied by PCR with direct sequencing and nested multiplex PCR. HeLa cervical cancer cells were transfected with human progesterone receptor-B (PR-B) and treated with P4.KCNH1mRNA expression in these cultures was studied by real-time PCR. KCNH1 protein was detected in 100% of the pregnancy samples and in 26% of the controls. We found 18 pregnant patients infected with HPV and detected 14 types ofHPV. There was no association between the percentage of cells expressing KCNH1 and either the presence or type of HPV. P4induced KCNH1 mRNA and protein expression in cells transfected with human PR-B. No regulation of KCNH1 by P4was observed in non-transfected cells. We show for the first time the expression of an ion channel during human pregnancy at different trimesters and KCNH1 regulation by P4in human cells. These data raise a new research field for KCNH1 channels in human tissues.
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Alcázar JL, Díaz L, Flórez P, Guerriero S, Jurado M. Intensive training program for ultrasound diagnosis of adnexal masses: protocol and preliminary results. Ultrasound Obstet Gynecol 2013; 42:218-223. [PMID: 23420783 DOI: 10.1002/uog.12440] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Revised: 12/28/2012] [Accepted: 01/04/2013] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To assess the feasibility of a specific training program for ultrasound diagnosis of adnexal masses. METHODS A 2-month intensive training program was developed. The program protocol consisted of a 1-day intensive theoretical course focused on clinical and sonographic issues related to adnexal masses and ovarian cancer, followed by a 4-week real-time ultrasound training program in a tertiary center (25-30 adnexal masses evaluated per month) and a final 4-week period for offline assessment of three-dimensional (3D) volumes from adnexal masses. In this final period, each trainee evaluated five sets of 100 3D volumes. 3D volumes contained gray-scale and power Doppler information, and the trainee was provided with clinical data for each case (patient age, menopausal status and reported symptoms). 3D volumes were obtained from surgically removed masses that had undergone histological diagnosis or from masses that had been followed up until resolution. After assessment of each set, the trainee's diagnostic performance was calculated (sensitivity and specificity) and each incorrectly classified mass was evaluated with the trainer. The objective was to achieve a sensitivity of > 95% and a specificity of > 90%. Learning curve cumulative summation (LC-CUSUM) graphs were plotted to assess the learning curve for the trainees. RESULTS One trainer and two trainees with little experience in gynecological ultrasound (one gynecologist and one radiologist) participated in this study. LC-CUSUM graphs showed that competence was achieved after 170 or 185 examinations. The objectives for diagnostic performance were achieved after assessment of the second set of 3D volumes (200 cases) for each trainee. CONCLUSIONS The proposed training program appears to be feasible. High diagnostic performance can be achieved after analysis of 200 cases and maintained thereafter.
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Affiliation(s)
- J L Alcázar
- Department of Obstetrics and Gynecology, Clínica Universidad de Navarra, School of Medicine, University of Navarra, Pamplona, Spain.
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Prieto P, Kinsner-Ovaskainen A, Stanzel S, Albella B, Artursson P, Campillo N, Cecchelli R, Cerrato L, Díaz L, Di Consiglio E, Guerra A, Gombau L, Herrera G, Honegger P, Landry C, O’Connor J, Páez J, Quintas G, Svensson R, Turco L, Zurich M, Zurbano M, Kopp-Schneider A. The value of selected in vitro and in silico methods to predict acute oral toxicity in a regulatory context: Results from the European Project ACuteTox. Toxicol In Vitro 2013; 27:1357-76. [DOI: 10.1016/j.tiv.2012.07.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Revised: 06/28/2012] [Accepted: 07/30/2012] [Indexed: 12/15/2022]
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González E, Díaz V, Munive E, Gutierrez L, Díaz L, Villanego I, Salas M. Definitive radiotherapy for unresected adenoid cystic carcinoma of the trachea. Rep Pract Oncol Radiother 2013. [DOI: 10.1016/j.rpor.2013.03.305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Santacreu DI, Collado R, Díaz L, Tormos M, García-Giménez J, Arrizabalaga B, Orero M, Pérez P, Ruiz M, Sancho-Tello R, Regadera A, Tormo M, Yagüe N, Egea M, O'Connor J, Sáez G, Carbonell F. P-232 Antioxidant system aberrations as response to generation of reactive oxygen species (ROS) in low/intermediate-1 risk myelodisplastic syndrome. Leuk Res 2013. [DOI: 10.1016/s0145-2126(13)70279-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
In-use vehicles which are high emitters (HEVs) make a large contribution to the emissions inventory. It is not known, however, whether HEVs share common emissions characteristics, and particularly the effect of ethanol blends. We study this by first examining laboratory measurements of exhaust and evaporative emissions on ethanol blends containing 21%, 26% and 30% aromatics, and a reference fuel formulated with methyl-tertiary butyl ether (MTBE). Switching from MTBE to ethanol fuels on HEVs shows no effect on the total emissions of regulated pollutants, but 1,3-butadiene emissions would increased substantially while the emissions of total carbonyls would not be affected except in the case of acetaldehyde, which would increase with EtOH. The ozone-forming potential of exhaust and evaporative emissions would be less using the EtOH blends and specific reactivity will not be incremented. Lowering the vapour pressure of the gasoline and increasing the proportions of alkylate and isomerate in the composition produces an ethanol-blended fuel with lower environmental impact both in normal vehicles and HEVs.
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Affiliation(s)
- I Schifter
- Instituto Mexicano del Petróleo, Mexico City, Mexico.
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Vazquez G, Jaén J, Alonso E, De de las Peñas M, Díaz L, De las Heras M, Pérez-Regadera J. Late Pulmonary Injury After Irradiation for Lung Cancer at 5-year Follow-up. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Cappetta M, Pérez V, Zubillaga MN, Elizondo V, Manrique G, Prosper I, Boschi S, Bonomi R, Pomoli S, Díaz L, Martínez L, Uriarte MR. Concomitant detection of BCR-ABL translocation and JAK2 V617F mutation in five patients with myeloproliferative neoplasm at diagnosis. Int J Lab Hematol 2012; 35:e4-5. [DOI: 10.1111/ijlh.12010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - V. Pérez
- Specialized Techniques Laboratory, Molecular Biology Division; Asociación Española Primera de Socorros Mutuos; Montevideo; Uruguay
| | - M. N. Zubillaga
- Specialized Techniques Laboratory, Molecular Biology Division; Asociación Española Primera de Socorros Mutuos; Montevideo; Uruguay
| | - V. Elizondo
- Specialized Techniques Laboratory, Molecular Biology Division; Asociación Española Primera de Socorros Mutuos; Montevideo; Uruguay
| | - G. Manrique
- Specialized Techniques Laboratory, Molecular Biology Division; Asociación Española Primera de Socorros Mutuos; Montevideo; Uruguay
| | - I. Prosper
- Specialized Techniques Laboratory, Cytogenetics Division; Asociación Española Primera de Socorros Mutuos; Montevideo; Uruguay
| | - S. Boschi
- Specialized Techniques Laboratory, Molecular Biology Division; Asociación Española Primera de Socorros Mutuos; Montevideo; Uruguay
| | - R. Bonomi
- Specialized Techniques Laboratory, Cytogenetics Division; Asociación Española Primera de Socorros Mutuos; Montevideo; Uruguay
| | - S. Pomoli
- Hematology Service; Hospital Central de las Fuerzas Armadas; Montevideo; Uruguay
| | - L. Díaz
- Hematology Service; GREMCA; Montevideo; Uruguay
| | - L. Martínez
- Specialized Techniques Laboratory, Hematology Division; Asociación Española Primera de Socorros Mutuos; Montevideo; Uruguay
| | - M. R. Uriarte
- Specialized Techniques Laboratory, Molecular Biology Division; Asociación Española Primera de Socorros Mutuos; Montevideo; Uruguay
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Díaz L, Borges ME. Low-quality vegetable oils as feedstock for biodiesel production using K-pumice as solid catalyst. Tolerance of water and free fatty acids contents. J Agric Food Chem 2012; 60:7928-7933. [PMID: 22799882 DOI: 10.1021/jf301886d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Waste oils are a promising alternative feedstock for biodiesel production due to the decrease of the industrial production costs. However, feedstock with high free fatty acids (FFA) content presents several drawbacks when alkaline-catalyzed transesterification reaction is employed in biodiesel production process. Nowadays, to develop suitable processes capable of treating oils with high free fatty acids content, a two-step process for biodiesel production is being investigated. The major problem that it presents is that two catalysts are needed to carry out the whole process: an acidic catalyst for free fatty acids esterification (first step) and a basic catalyst for pretreated product transesterification (second step). The use of a bifunctional catalyst, which allows both reactions to take place simultaneously, could minimize the production costs and time. In the present study, the behavior of pumice, a natural volcanic material used as a heterogeneous catalyst, was tested using oils with several FFA and water contents as feedstock in the transesterification reaction to produce biodiesel. Pumice as a bifunctional solid catalyst, which can catalyze simultaneously the esterification of FFA and the transesterification of fatty acid glycerides into biodiesel, was shown to be an efficient catalyst for the conversion of low-grade, nonedible oil feedstock into biodiesel product. Using this solid catalyst for the transesterification reaction, high FAME yields were achieved when feedstock oils presented a FFA content until approximately 2% wt/wt and a water content until 2% wt/wt.
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Affiliation(s)
- L Díaz
- Chemical Engineering Department, University of La Laguna, La Laguna, Tenerife, Canary Island 38200, Spain
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Méndez-Lagares G, Díaz L, Correa-Rocha R, León Leal JA, Ferrando-Martínez S, Ruiz-Mateos E, Pozo-Balado MM, Gurbindo MD, de José MI, Muñoz-Fernández MA, Leal M, Pacheco YM. Specific patterns of CD4-associated immunosenescence in vertically HIV-infected subjects. Clin Microbiol Infect 2012; 19:558-65. [PMID: 22735071 DOI: 10.1111/j.1469-0691.2012.03934.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Vertical transmission of human immunodeficiency virus (HIV) represents an important world-wide health problem although the incidence in developed countries has been drastically reduced by the extensive use of highly active antiretroviral therapy. Vertically HIV-infected subjects have been exposed to the virus during the maturation of their immune systems and have suffered a persistent chronic activation throughout their lifetime; the consequences of this situation for their immune system are not fully understood. The objective of this study was to analyse immunosenescence-related parameters in different CD4 T-cell subsets. Fifty-seven vertically HIV-infected subjects and 32 age-matched healthy subjects were studied. Activation (HLA(-) DR(+) ), senescence (CD28(-) CD57(+) ) and proliferation (Ki67(+) ) were analysed on different CD4 T-cell subsets: naive (CD45RA(+) CD27(+) ), memory (CD45RO(+) CD27(+) ), effector memory (CD45RO(+) CD27(-) ) and effector memory RA (CD45RA(+) CD27(-) ). Compared with healthy subjects, vertically HIV-infected subjects showed increased naive and memory CD4 T-cell frequencies (p 0.035 and p 0.010, respectively) but similar frequencies of both effector subsets. Whereas naive CD4 T cells were not further altered, memory CD4 T cells presented increased levels of senescence and proliferation markers (p <0.001), effector memory CD4 T cells presented increased levels of activation, senescence and proliferation markers (p <0.001) and effector memory RA CD4 T cells presented increased levels of activation and senescence (p <0.001) compared with healthy subjects. Despite long periods of infection, vertically HIV-infected subjects show specific patterns of immunosenescence, revealing a preserved CD4 T-cell homeostasis for subset differentiation and distribution. Nevertheless, excepting the naive subpopulation, all subsets experienced some immunosenescence, pointing to uncertain consequences of the future aging process in these subjects.
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Affiliation(s)
- G Méndez-Lagares
- Laboratory of Immunovivology, Clinic Unit of Infectious Diseases, Microbiology and preventive Medicine of Seville, IBiS, Virgen del Rocion University Hospital/CSiC/University of Seville, Seville 41013, Spain
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Gempeler FE, Díaz L, Sarmiento L. Manejo de la vía aérea en pacientes llevados a cirugía bariátrica en el Hospital Universitario de San Ignacio, Bogotá, Colombia. Revista Colombiana de Anestesiología 2012. [DOI: 10.1016/s0120-3347(12)70024-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Gempeler FE, Díaz L, Sarmiento L. Airway Management in Bariatric Surgery Patients at Hospital Universitario de San Ignacio, Bogotá, Colombia. Colombian Journal of Anesthesiology 2012. [DOI: 10.1016/s2256-2087(12)70024-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Díaz L, De Montijo S, Medina AL, Meléndez P, Laurence V, Marti- Mestres G. Actividad del extracto etanólico de las hojas de Machaerium floribundum contra bacterias que inducen el acné y su efecto citoprotector y antioxidante sobre fibroblastos. Rev peru biol 2011. [DOI: 10.15381/rpb.v18i2.221] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Borges ME, Brito A, Hernández A, Díaz L. Alkali Metal Exchanged Zeolite as Heterogeneous Catalyst for Biodiesel Production from Sunflower Oil and Waste Oil: Studies in a Batch/Continuous Slurry Reactor System. International Journal of Chemical Reactor Engineering 2011. [DOI: 10.1515/1542-6580.2467] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Biodiesel as an alternative fuel has become more important in recent times due to the increasing awareness of fossil fuel resources and the environmental benefits. The main disadvantages are its cost and availability of fats and oils resources. By collecting used frying oils and converting them to biodiesel fuel, the cost of biodiesel is significantly lowered and the negative impact of disposing used oil to environment reduced.The aim of this study was to analyse the performance of several alkali metal exchanged zeolites as heterogeneous catalysts for biodiesel production from sunflower oil and waste oil. Several catalysts studied showed a high activity for transesterification reaction with batch or continuous flow reactor operation conditions performed: temperature (100- 155°C), methanol/oil molar ratio (12:1- 72:1 mol/mol) and catalyst concentration (3-6 wt %). Results indicated that biodiesel production using waste oil as feedstock has good potential because it is an inexpensive and available feedstock.
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Carrascal LM, Díaz L. Asociación entre distribución continental y regional. Análisis con la avifauna forestal y de medios arbolados de la península Ibérica. GRAELLSIA 2011. [DOI: 10.3989/graellsia.2003.v59.i2-3.241] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Ortuño A, Díaz L, Alvarez N, Porras I, García-Lidón A, Del Río J. Comparative study of flavonoid and scoparone accumulation in different Citrus species and their susceptibility to Penicillium digitatum. Food Chem 2011. [DOI: 10.1016/j.foodchem.2010.09.012] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Miranda M, Díaz L, Sicilia M, Cristóbal I, Cassinello J. Seasonality and edge effect determine herbivory risk according to different plant association models. Plant Biol (Stuttg) 2011; 13:160-168. [PMID: 21143737 DOI: 10.1111/j.1438-8677.2009.00316.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report evidence of hierarchical resource selection by large herbivores and plant neighbouring effects in a Mediterranean ecosystem. Plant palatability was assessed according to herbivore foraging decisions. We hypothesize that under natural conditions large herbivores follow a hierarchical foraging pattern, starting at the landscape scale, and then selecting patches and individual plants. A between- and within-patch selection study was carried out in an area formed by scrubland and pasture patches, connected by habitat edges. With regard to between-patch selection, quality-dependent resource selection is reported: herbivores mainly consume pasture in spring and woody plants in winter. Within-patch selection was also observed in scrub habitats, influenced by season, relative patch palatability and edge effect. We defined a Proximity Index (PI) between palatable and unpalatable plants, which allowed verification of neighbouring effects. In spring, when the preferred food resource (i.e. herbs) is abundant, we observed that in habitat edges large herbivores basically select the relatively scarce palatable shrubs, whereas inside scrubland, unpalatable shrub consumption was related to increasing PI. In winter, a very different picture was observed; there was low consumption of palatable species surrounded by unpalatable species in habitat edges, where the latter were more abundant. These outcomes could be explained though different plant associations described in the literature. We conclude that optimal foraging theory provides a conceptual framework behind the observed interactions between plants and large herbivores in Mediterranean ecosystems.
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Affiliation(s)
- M Miranda
- Instituto de Investigación en Recursos Cinegéticos (IREC), CSIC-UCLM-JCCM, Ciudad Real, Spain
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Díaz L, Gutiérrez C, Page C, Lorente R, Hernández-Novoa B, Vallejo A, Domínguez E, Abad M, Madrid N, Moreno A, Pérez-Elías MJ, Rubio R, Muñoz-Fernández MA, Moreno S. Effect of 24 weeks of intensification with a CCR5-antagonist on the decay of the HIV-1 latent reservoir. J Int AIDS Soc 2010. [PMCID: PMC2999383 DOI: 10.1186/1758-2652-13-s3-o13] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2023] Open
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Schifter I, Díaz L, Rodríguez R. Cold-start and chemical characterization of emissions from mobile sources in Mexico. Environ Technol 2010; 31:1241-1253. [PMID: 21046954 DOI: 10.1080/09593331003663310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In this work tailpipe and evaporative emissions from a set of normal and high emitter vehicle models, year 2006-2008 (low mileage) certified when new to meet the Tier 1 emission standard, were characterized for criteria pollutants (carbon monoxide, nitrogen oxides and hydrocarbons), and a suite of unregulated emissions including aliphatic and aromatic aldehydes, monocyclic aromatic compounds, 1,3 butadiene, n-hexane and acrolein. Data were obtained under the three different driving conditions of the United States Federal Test Procedure, FTP-75 cycle. High emissions of both regulated and unregulated pollutants were observed in the cold-start phase of the driving cycle for low mileage Tier 1 normal and high emitters engines. Data were compared with results obtained for a set of MY > 1992-2005 that included vehicles with no catalytic converters, Tier 0 and MY 2000-5 Tier 1 emission standard with high mileage. The calculated average cold-start emissions for normal emitters in grams are 0.93, 8.21 and 1.06 for NMHC CO, and NOx, respectively for Tier 1 low mileage vehicles. The reductions in emissions for Tier 1 normal emitters are 76%, 56% and 56% for NMHC, CO and NOx, respectively, but 58%, 30% and 25% for the high emitters. Differences in emission can be ascribed to the mileage accumulation more than technological improvements. Cold-start emissions account in the USA roughly 10% of emissions from gasoline-powered vehicles. In Mexico the fractions are likely to be higher because one must account also for the contribution of Tier 0 and the running exhausts emissions of vehicles with no catalytic converters.
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Affiliation(s)
- I Schifter
- Instituto Mexicano del Petróleo, Dirección de Seguridad y Medio Ambiente, Eje Central Lázaro Cárdenas No. 152, México, D.F., 07730 Mexico.
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